Spray booth



Mar. 13, 1923. 1,448,000. 0. c. REEVES.

SPRAY BOOTH.

FILED JULY 2, 1921. 2 SHEETSSHEET s.

amwwboz ORWELL C. REEVES.

0. C. REEVES.

SPRAY BOOTH.

FILED JULY 2. 1921.

Z SHEET SHEET 2,

June M/bo'c OKWELL C 1855 v55.

Patented ORWELL C. REEVES,- OF TOLEDO, OHIO, ASSIGNOR TO TOLEDO SCALE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

SPRAY BOOTH.

Application filed July 2,

T 0 all whom it may concern:

Be it known that I, ORWELL C. Rmavns a citizen of the United States, residin at oledo, in the county of Lucas and tate of Ohio, have invented certain new and useful Improvements in Spra Booths, of which the following is a speclfication.

This invention relates to spray booths, and particularly to booths of the type containing a table or support for articles to be sprayed.

One object of the invention is to provide a booth wherein parts which. have been coated with lacquer or other coating material may be drying at the same time that other parts are being sprayed, the operation thus being continuous.

Another object of the invention is to provide means for adequately ventilating the booth in order to carry away the excess spray and the pungent fumes incident to the spraying operation and to hasten the process of drying.

Another object is to provide means for heating the booth so as to accelerate the drying of the sprayed or coated parts in order that the time required for successively spraying or coating the several parts carried by the table during one rotation thereof may be sufficient to allow the first sprayed parts to become dry.

Other objects and advantages will be apparent from the following description, in which reference is had to the accompanying drawings illustrating a preferred embodiment of my invention and wherein similar reference numerals designate similar parts throughout the several views.

In the drawings Figure 1 is a front elevation of a spray booth embodying my invention;

Figure 2 is a plan view thereof, the cover or roof bein removed to show the arrangement of the Interior; and

Figure 3 is a vertical sectional view taken substantially on the line 33 of Figure 2.

Referring to the drawin s in detail, the booth consists essentially o a housing having a circular wall 1 surmounted by a conical roof or cover 2, the cover having a stack 3 projecting upwardly from its apex. Positioned inside of and concentric with the circular wall 1 of the housing is a cylindrical casing 4 which is suspended from the roof 2 in any suitable manner, the lower end of 1921. Serial 'No. 482,138.

the casing 4 bein closed by a disk-like plate 5 (see Figure 3 Supported upon a suitable base 6 and centrally located with respect to the housing 1 1s a pedestal 7 havin a depending tubular portion 8 within the Tower end of which is secured a pillow block 9 of hardened steel having a convex upper bearing surface.

Rotatably received within the tubula portion 8 of the pedestal 7 is an upright shaft or spindle 10, the lower end thereof being convex and resting upon the convex upper surface of the pillow block 9 to form an anti-friction hearing. The upper end of the shaft 10 is similarly convex and engages the convex lower surface of a hardened steel plllOW block 11 which is fixed in the upper end of the sleeve 12 that surrounds the portion of the shaft 10 projecting above the pedestal 7. The sleeve is thus supported for rotation on a vertical axis.

The upper end of the sleeve 12 is provided with a horizontal flange to which is'secured a sheet metal plate 13 having arms orstrips 14 radiating therefrom, the arms 14 being connected at their outer ends to an annular member 15. A series of bracing spokes 16 extends from the annular member 15 to the lower end of the sleeve 12, thereby forming a rigid rotatable frame.

Supported upon the frame thus formed and positioned between the housing wall 1 and the casing wall 4 is an annular table 17 which is provided with a series of work holders ,18.

The annular space between the housing wall 1 and the casing wall 4 is divided into a series of compartments by means of vertical vanes 19 which are secured to the rotatable table 17. When the table is moved the compartments move with it, though their outer and inner walls remain stationary.

Supported at intervals around the interior of the housin wall 1 below the rotatable table 17 is a p urality of electric heating elements 20, the temperatures of which are regulated by controller switches 21 mounted upon a panel which projects from the exterior face of the housing wall 1. One of the switches 21 controls the heating elements at one side of the housing, while the other switch controls the heating elements at the other side. The heating elements 20 are accessible through openings in the housing wall which are closed by suitable sliding covers (see Figure 1). Positioned above the heating elements so as to be affected by the degree of heat of the portion of the housing in which they are located and visible through windows in the housing wall is a series of thermometers 23. By means of these the mometers the temperature of the several portions of the booth may be easily ascertained. The heat from the elements 20 passes upwardly between the metal vanes .19 and is drawn through a plurality of equally spaced apertures 24 located around the upper end of the casing 4 and thence out through the stack 3 by natural draft.

A portion of the housing 1 is cut away to form an opening 25 which serves as the operators and helpers stations. An electric lamp' 26 is positioned above the 'operators station so as to provide ample illumination therefor and a narrow shelf 27 projects outwardly from the operators side of the opening 25. I

in operating the spray booth the helper first places a set of unsprayed parts upon the work holder l8 on the section of the table which is directly in front of him and then rotates the table in a counter-clockwise direction through the width of one of the compartments formed by the vanes 19, thus bringing the parts before the operator and bringing an empty compartment before himself. The operator sprays the parts before him while the helper places more parts in the compartment which is now before the helpers station. The table is thus turned again and again to bring new work before the operator, the sprayed parts as they progress being dried by heat from the elements 20. by means of the controller switches 21 it is possible, if desired, to so regulate the heating of the different parts of the booth that the sprayed parts are subjected to a mounting temperature as they progress from the operators station. In some cases, however, it is unnecessary to employ the heating elements 20, as many kinds of coatings dry with sufiicient rapidity in ordinary temperatures to be ready for removal when they reach the helpers station, even though no artificial heat is employed.

A single opening 28 is cut in the casing wall 4 in radial alignment with the operators station. Through this opening the natural draft created by the stack 3 carries away the excess spray and the fumes which are incident to spraying or lacquering operations. The draft which carries away the excess spray and fumes is enhanced when the heating elements are employed, and in instances where the natural draft is lIlSllfficient an exhaust fan may be employed, though such a fan is not ordinarily needed in a booth of this type.

In order that excess spray may not escape from the operators station into the portion 'movab naaaooo the movement of the table at this point and to hold it against accidental turning movement during the spraying operation.

When the table has been revolved through one complete revolution the parts first.

sprayed are dry and the helper removes these finished parts and replaces them with uncoated parts. lhe operation may thus continue as lon as desired. I While it wil? be apparent that the illustrated embodiment of my invention herein disclosed is well calculated to adequately fulfill the objects primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope of the subjoined claims. i Having described my invention, I claim: 1. In a device of the class described, in combination, a booth havingan opening in the wall thereof, a plurality of movable com- 2. In a device of the\ class described,

combination, a booth having an opening in the wall thereof, a rotatable table in said booth, and a plurality of compartments carried by said table and adapted when rotated to be successively brought before the opening in the wall of said booth.

3. In a device of the class described, in combination, a booth having a circular outer housing wall with an opening therein, a circular inner casing wall concentric with said outer housing wall, said inner casing wall having an opening opposite the opening in said housing wall, and a rotatable annular table between said housing and casing walls.

4. In a device of the class described, in combination, a booth having a circular outer housing wall with an opening therein, a

circular inner casing wall concentric with said outer housing wall, said inner casing wall having an opening opposite the openin in said housing wall, and a rotatable annu lartable between said housing and casing walls, said table having a series of vanes thereon whereby the space between said housing and easing walls is divided into e compartments.

5. In a device of the class described, in combination, a spray booth having a circular outer housing wall with an opening therein, a substantially conical roof surmounting said housing, and a circular casing wall concentric with said housing wall and depending from said roof, said casing wall having a series of openings therein adjacent its upper end, said roof having an opening adjacent its apex.

6. In a device of the class described, in combination, a spray booth having a circular outer housing wall with an opening therein, a substantially conical roof surmounting said housing, a circular casing wall concentric with said housing wall and depending from said roof, said casing wall having a series of openings therein adjacent its upper end, said roof having an opening adjacent its apex, and a stack extending upwardly from the opening in said roof.

7. In a device of the class described, in combination, a spray booth having an opening in one wall thereof, a movable work carrier within said booth, said work carrier passing before said opening, ventilating means in said booth, and means for heating the interior of said booth.

8. In a device of the class described, in combination, a booth having an outer housing wall with an opening therein, an inner casing wall, an annular table between said casing and housing walls, and means for heating and ventilating the space between said inner and outer casing walls.

9. In a device of the class described, in combination, a booth having a circular outer housing wall, a circular inner casing wall concentric therewith, an annular rotatable table located between said walls, and a series ofblheating elements located beneath said ta e.

10. In a device of the class described, in combination, a booth having a circular outer housing wall, a circular inner casing wall concentric therewith, an annular rotatable table located between said walls, a series of heating elements located beneath said table, and means for independently controlling the heating elements in different parts of said series,

11. In a device of the class described, in combination, a booth having a circular outer housing wall, a circular inner casing wall concentric with said housing wall, a rotatable annular table between said walls, a substantially conical roof surmounting said housing wall, and a stack extending upwardly from the apex of said roof.

12. In a device of the class described, in

combination, a booth having a circular outer housing wall, a circular inner casing wall concentric with said housing wall, a rotatable annular table between said walls, a substantially conical roof surmounting said housing wall, a stack extending upwardly from the apex of said roof, and means for heating the interior of said booth.

13. In a device or the class described, in combination, a booth having a circular outer housing wall, a circular inner casing wall concentric with said housing wall, a rotatable annular table between said walls, a substantially conical roof surmounting said housing wall, a stack extending upwardly from the apex of said roof. and a series of heating elements beneath said annular table.

14. In a device of the class described, in combination, a booth having a circular outer housing wall, a circular inner casing wall concentric with said housing wall, a rotatable annular table between said walls, a substantially conical roof surmounting said housing wall, a stack extending upwardly from the apex of said roof, a series of heating elements beneath said annular table, and a plurality of thermometers within said booth and visible through windows in said outer housing wall. c

15. In a device of the class described, in combination, a booth having a circular outer housing wall, a spindle centrally located with respect to said wall, a roof surmounting said housing wall, a rotatable table mounted on said spindle, a circular casing wall depending from said roof within said housing wall, and a closure for the lower end of said casing wall.

16. In a device of the class described, in combination, a booth having a circular outer housing wall, a spindle centrally located with respect to said wall, a roof surmounting said housing wall, a rotatable table mounted on said spindle, a circular casing wall depending from said roof within said housing wall, a closure for the lower end of said casing wall, and a plurality of heating elements located below said rotatable table ORWELL C. REEVES.

Witnemes FRANCES Dom, HARRY ERNBBERGER 

